Some of President Donald Trump's supporters began threatening to boycott Kevin Hart after the comedian threw a couple of jabs at the commander-in-chief during the 2018 MTV VMAs.

While presenting with “Night School” co-star Tiffany Haddish, Hart told the star-studded audience that in this venue, people were “allowed to kneel,” referencing NFL players protesting during the national anthem. He continued: "You can do whatever you want. There's no old white men to stop you."

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The 2018 MTV Video Music Awards at Radio City Music Hall in New York City Aug. 20, 2018, recognized and showcased top music talent. After the ceremony, Alex Rodriguez and Jennifer Lopez attended Jennifer Lopez's MTV VMA's Vanguard Award Celebration on August 21, 2018 in New York, with Lopez rocking Versace. Getty Images for TAO Group

Victor Cruz and Karrueche Tran posed for a photo together at the Republic Records VMA After-Party following the award ceremony in New York on Aug. 20, 2018. Photo by Craig Barritt/Getty Images for Republic Records

Hart wasn't the only celeb to get political. During his performance, the rapper Logic was joined onstage by young immigrants wearing T-shirts that read, "We are all human beings" to protest the Trump administration's separation of migrant children from their parents after they crossed the border illegally.

Logic, best known for the suicide prevention anthem "1-800-273-8255," wore a T-shirt that read, "(Expletive) the wall."

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Musicians and guests glammed out for the 2018 MTV Video Music Awards at Radio City Music Hall in New York City on Aug. 20, 2018, to honor the best in music videos over the past year. Check out the best looks on the VMAs pink carpet, including this one from Video Vanguard Award winner Jennifer Lopez, who wore a stunning Versace gown. Jamie McCarthy, Getty Images

Jennifer Lopez is known for turning heads at the VMAs red carpet and Monday night was no different. She wore a stunning one-shouldered metallic gown, while her boyfriend Alex Rodriguez kept it sleek in a maroon tuxedo jacket. Getty Images for MTV